CN102123464A - Method and device for selecting mobility management entity (MME) - Google Patents
Method and device for selecting mobility management entity (MME) Download PDFInfo
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- CN102123464A CN102123464A CN2011100242045A CN201110024204A CN102123464A CN 102123464 A CN102123464 A CN 102123464A CN 2011100242045 A CN2011100242045 A CN 2011100242045A CN 201110024204 A CN201110024204 A CN 201110024204A CN 102123464 A CN102123464 A CN 102123464A
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Abstract
The invention discloses a method for selecting a mobility management entity (MME), which is used for reselecting the MME for user equipment (UE) under the MMEs in a superposed MME pool. The method comprises the following steps that: a node B determines the MME which is connected with the UE for which the MME is required to be reselected in the load re-balancing process; the node B searches an MME group identifier corresponding to the MME which is connected with the UE; when a plurality of MME group identifiers are searched out by the node B, one MME group identifier is selected from the MME group identifiers corresponding to the MMEs which are connected with the node B; and the node B reselects the MME from an MME shared pool corresponding to the selected MME group identifier. The invention also discloses a device which is used for realizing the method.
Description
Technical field
The present invention relates to the communications field, particularly relate to method and the device of selecting MME (Mobility Management Entity).
Background technology
In order to realize utilance energy-conservation and the raising communication equipment, the load of communication equipment is the focal issue of paying close attention in the industry always.
(the System Architecture Evolution of SAE in version 10 (R10), System Architecture Evolution) system architecture has followed the multi-link mode of Iu (a kind of interface) of UMTS (universal mobile telecommunications system), be that the interior MME of certain limit can form a MME shared pool (MME Pool), an eNB can connect simultaneously with a plurality of MME among the MME Pool, this is called as S1-FLEX (S1Flexibility in SAE, S1 shares, and wherein S1 is the interface between eNB and the EPC (evolution block core net)).Under this system architecture, the MME of load overload or the MME that stops to serve, can be by heavy balance (Load re-balancing) process of load, the UE under it (subscriber equipment) is assigned in other MME among the MME Pool at this MME place, to reach load balancing or purpose of energy saving.
Along with the development of system architecture, in the future have a kind of framework to be: a MME belongs to a plurality of MME Pool simultaneously, promptly exist between at least two MME Pool overlapping, shown in Figure 1A.ENB (evolution base station) 1-eNB4 is connected with the MME1-MME3 of group among 1 (Group1), and eNB 5-eNB8 is connected with MME3-MME5 in the group 2, wherein MME3 belong to simultaneously organize 1 with organize 2.Yet, in the heavy equilibrium process of load, when the MME UE down that is arranged in the overlay region need be assigned to other MME, because the MME of overlay region belongs to a plurality of MME Pool, so can't determine UE should be assigned at this moment the MME among which MME Pool.At this kind situation, prior art does not still have effective solution.
Summary of the invention
The embodiment of the invention provides method and the device of a kind of MME of selection, and the UE that is used for being embodied as under the MME in overlapping MME pond reselects MME.
A kind of method of selecting MME may further comprise the steps:
The MME that UE connected of gravity treatment MME need to be determined in the base station in the heavy equilibrium process of load;
The MME group id of the MME correspondence that base station lookups UE connected;
When base station lookups goes out a plurality of MME group id, from the MME group id corresponding, select a MME group id with all MME that self connect;
The base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of selection.
A kind of base station comprises:
Control module is used for need determining the MME that UE connected of gravity treatment MME at the heavy equilibrium process of load;
Enquiry module is used to search the MME group id of the MME correspondence that UE connects;
Sign is selected module, when being used to find out a plurality of MME group id, selects a MME group id from the MME group id corresponding with all MME that self connect;
MME selects module, is used for from the MME shared pool gravity treatment MME of the MME group id correspondence of selecting.
When base station lookups goes out the corresponding a plurality of MME group id of MME that UE connects in the embodiment of the invention, from the corresponding MME group id of all MME of connecting with self, select a MME group id, and from the MME shared pool of the MME group id correspondence selected, be chosen as the MME that UE distributes.When having solved MME and belonging to a plurality of MME Pool, can't be the problem of UE gravity treatment MME.
Description of drawings
Figure 1A is the schematic diagram of SAE system architecture in the embodiment of the invention;
Figure 1B is the main method flow chart of gravity treatment MME in the embodiment of the invention;
Fig. 2 is the detailed method flow chart of gravity treatment MME in the embodiment of the invention;
Fig. 3 is for selecting the method flow diagram of MME by the set mode in the embodiment of the invention;
Fig. 4 is a method flow diagram of selecting MME in the embodiment of the invention by counting mode;
Fig. 5 is the primary structure figure of base station in the embodiment of the invention;
Fig. 6 is the detailed structure view of base station in the embodiment of the invention.
Embodiment
When base station lookups goes out the corresponding a plurality of MME group id of MME that UE connects in the embodiment of the invention, from the corresponding MME group id of all MME of connecting with self, select a MME group id, and from the MME shared pool of the MME group id correspondence selected, be chosen as the MME that UE distributes.When having solved MME and belonging to a plurality of MME Pool, can't be the problem of UE gravity treatment MME.
The MME group id is the sign (ID) of MME Pool in the present embodiment, and the information word (IE) of carrying MMEPool ID in the message is MME group id (MME Group ID), so in the present embodiment MME Pool ID is called the MME group id.Same, a MME Pool is a MME group.
Referring to Figure 1B, the main method flow process of gravity treatment MME is as follows in the present embodiment:
Step 101: in the heavy equilibrium process of load, the MME that UE connected of gravity treatment MME need to be determined in the base station.
Step 102: the MME group id of the MME correspondence that base station lookups UE connected.
Step 103: when base station lookups goes out a plurality of MME group id, from the MME group id corresponding, select a MME group id with all MME that self connect.When base station lookups goes out a MME group id, then can be according to prior art, gravity treatment MME from the MME shared pool of this MME group id correspondence.
Step 104: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of selection.The mode of selecting has multiple, can be to select at random, and the poll formula is selected, or selects the lightest MME of load etc.
In step 103, the base station can be chosen a MME group id wantonly from the MME group id corresponding with all MME that self connect.During configuration-system, the MME that the base station is connected belongs to same MME Pool, and preferable mode is gravity treatment MME from the MME Pool of base station correspondence.But system gives the information of base station configuration MME Pool aspect, so the preferred mode that present embodiment provides is to determine the MME Pool of base station correspondence by the largest cumulative weight, and detailed process is referring to the following examples.
Referring to Fig. 2, the detailed method flow process of gravity treatment MME is as follows in the present embodiment:
Step 201: in the heavy equilibrium process of load, the base station receives tracing section updating (Tracking Area Update, TAU) request that UE sends.Concrete, UE can periodically send the TAU request, perhaps sends the TAU request after receiving RRC (Radio Resource control) connection release (RRCConnectionRelease) message that the base station sends.The base station determines that when receiving termination (stop) message that MME sends MME initiates the heavy equilibrium process of load.
Step 202: the RRC that carries the TAU request that the base station sends according to UE connects to set up does not provide registration MME information in the request message, determine that this UE needs gravity treatment MME, and determine the MME that this UE is connected.
Step 203: the MME group id of the MME correspondence that base station lookups UE connected.For example, carry the GUMMEI (global unique MME sign) that provides in the RRC message of the TAU request of UE or other message NAS (Non Access Stratum, Non-Access Stratum) message, the MME that UE connects can be determined by GUMMEI in the base station.
Step 204: the base station according to and the corresponding MME group id of all MME that self connects, determine the MME group id of accumulated weight maximum.
Step 205: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of weight maximum.
Step 206: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of selection.
Base station selected MME is the MME into the UE gravity treatment, and the base station can also send message to UE, makes UE be connected to this MME.
The MME group id of determining the accumulated weight maximum in the present embodiment has multiple implementation, as by common factor is got in the set of MME group id, perhaps to modes such as MME group id countings, every mode that can obtain the MME Pool of base station correspondence all is applicable to present embodiment, introduces in detail below by two embodiment.
Referring to Fig. 3, select the method flow of MME as follows by the set mode in the present embodiment:
Step 301: in the heavy equilibrium process of load, the base station receives the TAU request that UE sends.
Step 302: the RRC that carries the TAU request that the base station sends according to UE connects to set up does not provide registration MME information in the request message, determine that this UE needs gravity treatment MME, and determine the MME that this UE is connected.
Step 303: the MME group id of the MME correspondence that base station lookups UE connected.
Step 304: the MME group id that the base station will be corresponding with each MME that self connects constitutes a set.
Step 305: the set intersection computing is carried out with the set corresponding with all MME that self connect in the base station, determines that the MME group id that obtains after the computing is the MME group id of accumulated weight maximum.
Step 306: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of weight maximum.
Step 307: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of selection.
For example, be example with the system architecture of Figure 1A, MME1, MME2 and MME3 belong to group 1, MME, 3, MME4 and MME5 belong to group 2, wherein MME3 belongs to group 1 and group 2 simultaneously.ENB4 and MME1, the MME2 and the MME3 that organize in 1 have annexation.ENB4 receives the TAU request that the UE under the MME3 sends in the heavy equilibrium process of load, be required to be this UE gravity treatment MME.The MME group id that each MME that the base station will connect with self will be corresponding constitutes a set, and the corresponding relation of MME and MME group id is joined and is shown in Table 1:
Table 1
| The MME sign | The set of MME group id |
| MME?1 | (Group?1) |
| MME?2 | (Group?1) |
| MME?3 | (Group?1，Group?2) |
After common factor is got in three set in the his-and-hers watches 1, obtain the result and be Group 1 (group 1), then the MME except that MME3 is selected in the base station from Group 1.If in occuring simultaneously a plurality of MME group ids are arranged, then the base station therefrom selects a MME group id to continue the step of back.Can be to select at random, poll formula selection etc.
Referring to Fig. 4, select the method flow of MME as follows by counting mode in the present embodiment:
Step 401: in the heavy equilibrium process of load, the base station receives the TAU request that UE sends.
Step 402: the RRC that carries the TAU request that the base station sends according to UE connects to set up does not provide registration MME information in the request message, determine that this UE needs gravity treatment MME, and determine the MME that this UE is connected.
Step 403: the MME group id of the MME correspondence that base station lookups UE connected.
Step 404: the base station pair MME group id corresponding with all MME that self connect counted.
Step 405: the base station determines that the MME group id of numerical value maximum is the MME group id of accumulated weight maximum.
Step 406: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of weight maximum.
Step 407: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of selection.
For example, be example with the system architecture of Figure 1A, MME1, MME2 and MME3 belong to group 1, MME, 3, MME4 and MME5 belong to group 2, wherein MME3 belongs to group 1 and group 2 simultaneously.ENB4 and MME1, the MME2 and the MME3 that organize in 1 have annexation.ENB4 receives the TAU request that the UE under the MME3 sends in the heavy equilibrium process of load, be required to be this UE gravity treatment MME.The base station pair MME group id corresponding with all MME that self connect counted, MME1, MME2 and MME3 all belong to group 1, and therefore organizing 1 number of times that occurs is 3, and MME3 also belongs to group 2, therefore organizing 2 number of times that occur is 1, the MME group id that ginseng is shown in Table 2 and the corresponding relation of count value:
Table 2
| Group?ID | Count value |
| Group?1 | 3 |
| Group?2 | 1 |
According to the count results in the table 2, the count value maximum be Group 1 (group 1), then the MME except that MME3 is selected in the base station from Group1.If in occuring simultaneously a plurality of MME group ids are arranged, then the base station therefrom selects a MME group id to continue the step of back.Can be to select at random, poll formula selection etc.
Wherein, the base station can obtain the group at the MME place of UE connection in advance.At the UE access network, and when connecting by the S1 (a kind of interface) that the base station is established to MME, the base station sends S1 to MME and sets up request (S1SETUP REQUEST) message, if set up successfully, MME returns S1 to the base station and sets up response (S1SETUP RESPONSE) message, the structure of S1SETUP RESPONSE message ginseng is shown in Table 3, and it comprises that a type is the IE of OCTET STRING (2) (information word)---MMEGroup ID, and this IE is used to illustrate the territory, pond under the MME.That is, the base station can obtain the group at the MME place of UE connection by S1 SETUPRESPONSE message.
Table 3
Understood the implementation procedure of selecting MME by above description, this process mainly realizes that by the base station internal structure and the function to the base station is introduced below.
Referring to Fig. 5, the base station comprises in the present embodiment: control module 501, enquiry module 502, sign select module 503 and MME to select module 504.The base station can be specially the network equipment that evolution base station (eNB) etc. has access control function in the present embodiment.
When sign selects module 503 to be used to find out a plurality of MME group id, from the MME group id corresponding, select a MME group id with all MME that self connect.Preferable, sign select 503 modules according to and the corresponding MME group id of all MME that self connects, determine the MME group id of accumulated weight maximum, and from the MME shared pool of the MME group id correspondence of weight maximum gravity treatment MME.For example, sign selects the MME group id that module 503 will be corresponding with each MME that self connects to constitute a set, and the corresponding set of all MME that connects with self carried out the set intersection computing, determine that the MME group id that obtains after the computing is the MME group id of accumulated weight maximum.Perhaps, sign selects 503 pairs of MME group ids corresponding with all MME that self connect of module to count, and the MME group id of determining the numerical value maximum is the MME group id of accumulated weight maximum.When defining the MME group id of a plurality of accumulated weight maximums, sign selects module 503 to select the MME group id of an accumulated weight maximum from the MME group id of a plurality of accumulated weight maximums.
MME selects module 504 to be used for from the MME shared pool gravity treatment MME of the MME group id correspondence of selecting.
The base station also comprises: interface module 505, and referring to shown in Figure 6.Interface module 505 is used for receiving the TAU request that UE sends at the heavy equilibrium process of load.Control module 501 is determined this UE needs gravity treatment MME according to this TAU request, and determines the MME that this UE is connected.
When base station lookups goes out the corresponding a plurality of MME group id of MME that UE connects in the embodiment of the invention, from the corresponding MME group id of all MME of connecting with self, select a MME group id, and from the MME shared pool of the MME group id correspondence selected, be chosen as the MME that UE distributes.When having solved MME and belonging to a plurality of MME Pool, can't be the problem of UE gravity treatment MME.For MME and the existing system compatibility that makes selection, and do not influence the MME Pool of base station correspondence, the embodiment of the invention is determined the MME group id of accumulated weight maximum, is chosen as the MME that UE distributes from the MME shared pool of the MME group id correspondence of accumulated weight maximum.And the embodiment of the invention provides the scheme of the MME group id of multiple definite accumulated weight maximum, and is simple.
Those skilled in the art should understand that embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware embodiment, complete software implementation example or in conjunction with the form of the embodiment of software and hardware aspect.And the present invention can adopt the form that goes up the computer program of implementing in one or more computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is that reference is described according to the flow chart and/or the block diagram of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block diagram and/or square frame and flow chart and/or the block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out by the processor of computer or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame appointments.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, make the instruction that is stored in this computer-readable memory produce the manufacture that comprises command device, this command device is implemented in the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
These computer program instructions also can be loaded on computer or other programmable data processing device, make on computer or other programmable devices and to carry out the sequence of operations step producing computer implemented processing, thereby the instruction of carrying out on computer or other programmable devices is provided for being implemented in the step of the function of appointment in flow process of flow chart or a plurality of flow process and/or square frame of block diagram or a plurality of square frame.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (10)
1. a method of selecting MME is characterized in that, may further comprise the steps:
The MME that UE connected of gravity treatment MME need to be determined in the base station in the heavy equilibrium process of load;
The MME group id of the MME correspondence that base station lookups UE connected;
When base station lookups goes out a plurality of MME group id, from the MME group id corresponding, select a MME group id with all MME that self connect;
The base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of selection.
2. the method for claim 1 is characterized in that, in the heavy equilibrium process of load, the base station need to determine the step of the MME that UE connected of gravity treatment MME to comprise:
The base station receives the tracing section updating TAU request that UE sends in the heavy equilibrium process of load;
The RRC that carries the TAU request that the base station sends according to UE connects to set up does not provide registration MME information in the request message, determine that this UE needs gravity treatment MME, and determine the MME that this UE is connected.
3. method as claimed in claim 1 or 2, it is characterized in that, select the step of a MME group id to comprise from the MME group id corresponding with all MME that self connect: the MME group id of accumulated weight maximum is determined according to the corresponding MME group id of all MME that is connected with self in the base station;
The step of base station gravity treatment MME from the MME shared pool of the MME group id correspondence of selection comprises: the base station is gravity treatment MME from the MME shared pool of the MME group id correspondence of weight maximum.
4. method as claimed in claim 3 is characterized in that, according to the corresponding MME group id of all MME that connects with self, determines that the step of the MME group id of accumulated weight maximum comprises:
The MME group id that each MME that the base station will connect with self will be corresponding constitutes a set, and the set intersection computing is carried out in the set corresponding with all MME that self connect, and determines that the MME group id that obtains after the computing is the MME group id of accumulated weight maximum; Perhaps
The base station pair MME group id corresponding with all MME that self connect counted, and the MME group id of determining the numerical value maximum is the MME group id of accumulated weight maximum.
5. method as claimed in claim 3 is characterized in that, when defining the MME group id of a plurality of accumulated weight maximums, also comprises step: the MME group id of an accumulated weight maximum is selected in the base station from the MME group id of a plurality of accumulated weight maximums.
6. a base station is characterized in that, comprising:
Control module is used for need determining the MME that UE connected of gravity treatment MME at the heavy equilibrium process of load;
Enquiry module is used to search the MME group id of the MME correspondence that UE connects;
Sign is selected module, when being used to find out a plurality of MME group id, selects a MME group id from the MME group id corresponding with all MME that self connect;
MME selects module, is used for from the MME shared pool gravity treatment MME of the MME group id correspondence of selecting.
7. base station as claimed in claim 6 is characterized in that, also comprises: interface module is used for receiving the tracing section updating TAU request that UE sends at the heavy equilibrium process of load;
Control module is determined this UE needs gravity treatment MME according to this TAU request, and determines the MME that this UE is connected.
8. as claim 6 or 7 described base stations, it is characterized in that, sign select module according to and the corresponding MME group id of all MME that self connects, determine the MME group id of accumulated weight maximum, and from the MME shared pool of the MME group id correspondence of weight maximum gravity treatment MME.
9. base station as claimed in claim 8, it is characterized in that, sign selects the MME group id that module will be corresponding with each MME that self connects to constitute a set, and the corresponding set of all MME that connects with self carried out the set intersection computing, determine that the MME group id that obtains after the computing is the MME group id of accumulated weight maximum; Perhaps
Sign selects the module pair MME group id corresponding with all MME that self connect to count, and the MME group id of determining the numerical value maximum is the MME group id of accumulated weight maximum.
10. base station as claimed in claim 8 is characterized in that, when defining the MME group id of a plurality of accumulated weight maximums, sign selects module to select the MME group id of an accumulated weight maximum from the MME group id of a plurality of accumulated weight maximums.
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| CN106686650A (en) * | 2015-11-09 | 2017-05-17 | 中兴通讯股份有限公司 | Capacity notification, MME selection method and MME, evolved node B |
| CN109392033A (en) * | 2017-08-08 | 2019-02-26 | ***通信有限公司研究院 | A kind of data transmission method, device, system, base station, AMF and medium |
| CN109392033B (en) * | 2017-08-08 | 2020-11-24 | ***通信有限公司研究院 | Data transmission method, device, system, base station, AMF and medium |
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